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CE AND ADJUSTMENTS
...................
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TO ADJUST
CARBURETOR
(See Figs,
31 and
32)
The carburetor has been preset at the factory and adjust-
ment should not be necessary.
However, minor adjust-
ment may be required to compensate for differences in fuel,
temperature, attitude or toad. If the carburetor does need
adjustment, proceed as follows:
in general, turning the mixture screw in (ctockwise) de-
creases the supply of fuel to the engine giving a leaner fuel!
air mixture. Turning the mixture screw out (counterclock-
wise) increases the supply of fuel to the engine giving a
richer fuel/air mixture.
IMPORTANT:
DAMAGE
TO THE NEEDLES
AND THE
SEATS
IN CARBURETOR
MAY RESULT
IF SCREW
tS
TURNED
NTOOTIGHT.
PRELIMINARY
SETTING -
-
Be sure you have a clean air filter, and the throttle
control cabte and choke are adjusted properly (see
above).
-
With engine off turn idle mixture screw in (clockwise)
closing it finger tight and then turn out (counterclock:
w_se) 1-1/4 to 1-1/2 turns.
FINAL SETTINq
-
Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position.
.
With throttle control lever in,slow (.a_) position, hold
throttle fever against idle speed screw and adjust idle
speed screw to obtain 1200 to 1400 RPM.
.
While still holding throttle lever against idle speed
screw, turn idle mixture screw in (clockwise)
untit
engine begins to die and then turn out (counterctock-
wise) until engine runs rough.
Turn screw to a point
midway between those two positions.
•
Continue to hold throttle tever against idle speed screw
and adjust idle speed screw to obtain 900 to 1200 RPM.
Release throttle lever.
ACCELERATION
TEST -
Move throttle control lever from slow (._)
to fast (,_)
position.
If engine hesitates or dies turn idle mixture
screw out (counterclockwise)
1/8 turn
Repeat test
and continue to adjust, ifnecessary, until engine accel-
erates smoothly.
High
speed
stop
is factory
adjusted.
Do
not adjust
-
damage
may _esuft.
IMPORTANT:
NEVER
TAMPER
WITH
THE
ENGINE
GOVERNOR,
WHrCH
IS FACTORY
SET
FOR PROPER
ENGINE SPEED.
OVERSPEEDING
THEENGINE
ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
CAN
BE
DANGEROUS.
IF YOU THINK THE ENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST
AUTHORIZED
SERVlCE
CENTER/
DEPARTMENT,
WHICH HAS PROPER
EQUIPMENT
AND
EXPERIENCE
TO
MAKE
ANY
NECESSARY
ADJUSTMENTS.
IDLE SPEED
SCREW'
IDLE M|XTURE
SCREW
THROTTLE
LEVER
FiG. 31
,## s#EED
/
THROTTLE
LEVER
_IDLE
MIXTURE
SCREW
FIG. 32
24
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